Audio/video control and switching unit



FIG. 1 is a left front perspective view from above of an audio/video control and switching unit embodying the new design;

FIG. 2 is a left rear perspective view from above thereof;

FIG. 3 is a right side elevational view thereof thereof; and,

FIG. 4 is a bottom plan view therof.

The broken lines environmental are for illustrative purpose only and form no part of the claimed design. 

The ornamental design for an audio/video control and switching unit, substantially as shown and described. 